Approaches to design inorganic semiconductors while maintaining structural motifs *Project supported by the National Natural Science Foundations of China (No. 11774239), the Natural Science Foundation of SZU (No. 827-000242), the High-End Researcher Startup Funds of SZU (No. 848-0000040251), and the Supporting Funds from Guangdong Province for 1000 Talents Plan (No. 85639-000005). (July 2018)